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www.dmp.wa.gov.au SOUTH WEST HUB CO SEQUESTRATION 2 Petroleum Division Government of Western Australia Department of Mines and Petroleum Investigating CO storage in Western Australia 2 Future work will acquire more pre-competitive data and may include: As the Lead Agency for Greenhouse Gas (GHG) storage in Western Australia, the Department of Mines and Petroleum (DMP) has three main roles: To regulate the development of GHG storage (Carbon dioxide) To provide pre-competitive data To provide assurance to the public that the operations are safe and that the GHG is removed from the atmosphere and safely stored underground for 1000 years. Large power plants are located in the South West at Kwinana and in the Collie area with combined annual CO emissions in the order of 27 million tonnes 2 per year (Mtpa). Government and industry are collaborating to investigate the potential of the geosequestration of CO in the deep saline formation of the 2 Lesueur Sandstone in the southern Perth Basin. The objective of the South West Hub project is to store up to 6.5 Mtpa of CO over an injection period of forty 2 years. Two desk top studies analysed all the available data to locate an area in the Harvey and Waroona Shires that offers the greatest storage potential. A 2D seismic study was conducted in March 2011 and the 2945-m deep Harvey 1 stratigraphic well was drilled in February and March 2012. This stratigraphic well obtained technical data and samples that reduce the uncertainty of storage capacity. Drilling data wells and conducting a trial injection Acquisition of 3D seismic data which will give more information on the subsurface including fault distribution in the area Drilling a slimhole well to 1000 m depth to further determine the thickness of the shale in the Eneabba Formation and the salinity of the Eneabba Formation and Yalgorup Member AUGUST 2013 Indeed, a major GHG storage project such as the South West Hub moves from uncertainty to certainty in a series of staged evaluations that provides improved knowledge of the subsurface. These activities will assist DMP to assume its role as regulator once the project is operational. Shale - spikes Base - Wonnerup 2900 m Top - Wonnerup 1380 m Updated Top Myalup - N Updated Eneabba Shale - N Unconformity 300 m Clean Sand - Thickness 1520 m Harvey 1 Myalup 1 - N Myalup 2 - N Myalup 3 - N Top Wonnerup - N Unconformity - N 2D SEISMIC LINE 11GA_LL2 RESERVOIR CHARACTERIZATION HARVEY 1 WELL LOG Overview of logged section, 841-2878 m, including core intervals. Hole shape: Blue curve = Bit Red curve = Average Caliper Borehole size 8.5 inch. Enlarged borehole in top section (841-1370 m). GR: scale 0-250 Core intervals, shiftet depths: Core 1 = 892.25 - 928.75 m Core 2 = 1263.5 - 1314.5 m Core 3 = 1317.4 - 1332.4 m Core 4 = 1333.0 - 1341.0 m Core 5 = 1896.4 - 1948.1 m Core 6 = 2479.0 - 2531.0 m Area of interest Top Yalgorup Top Wonnerup Base Wonnerup Hole shape Depth MD DENS–Blue NEUT–Red 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 MAX DEPTH Azimuth No. of MAX DIP 80 90 121 112 111 141 126 133 1123 143 98 121 111 112 56 Avg = Average K Kpor = K from porosity KWYR = K from Wyllie-Rose Kpor = K from Dumanoir-Coates MD 2 4 8 0 2 4 9 0 2 5 0 0 2 5 1 0 (m) MD 2 4 8 0 2 4 9 0 2 5 0 0 2 5 1 0 2 5 2 0 (m) WELL CORRELATION One of the more significant observations interpreted from Harvey 1 logs and core data is that an interval in the Wonnerup Member of the Lesueur Sandstone showed poor to good ranges in permeability, which reduces CO injection constraints for the 2 planned storage. A preliminary dynamic model, prepared by DMP and Schlumberger Greenhouse Gas Solutions, shows that the CO plume does not 2 reach the main faults in any of the scenarios in 1000 years. Line 2 of the seismic survey located along Riverdale Road showing the interpreted stratigraphy and position of GSWA Harvey 1 STYLIZED REPRESENTATION OF THE PROJECT Schematic showing conceptual geology of the SW Hub study area Core from the basal section of the upper Lesueur Sandstone Horizon maps of the Yalgorup and Wonnerup members and proposed area of injection Maximum dip within all sets of cross-bedding thicker than 20 cm are displayed Location map of the southern Perth Basin showing the SW Hub sequestration area. Line A-B is represented in the well correlation figure. The insert box refers to the fault distribution map of the Harvey region Reservoir characterization – logs showing expected porosity and permeability of the CO reservoir 2 6334900 m 6339900 m 6344900 m 6349900 m 6354900 m 6355900 m 380500 mE 385500 mE 390500 mE 395500 mE 11GA_LL1 11GA_LL2 11GA_LL4 11GA_LL46 11GA_LL5 11GA_LL3 FAULT DISTRIBUTION – HARVEY REGION 11GA_LL1 11GA_LL4 11GA_LL46 1 1G A_LL5 11GA_LL3 11GA_LL2 SEE WELL CORRELATION AND FAULT DISTRIBUTION DIAGRAM 30 km WONNERUP 1 HARVEY 1 LAKE PRESTON 1 PINJARRA 1 ROCKINGHAM 1 COCKBURN 1 A B B A Cockburn 1 Rockingham 1 Pinjarra 1 Lake Preston 1 Harvey 1 Wonnerup 1
